<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="calc/sum">
        <h1>计算机</h1>
        数字1： <input type="text" name="num1"> <br>
        数字2：<input type="text" name="num2"> <br>
        <input type="submit" name="相加">
    </form>
</body>
</html>